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<meta http-equiv="Content-Type" content="text/html;  charset="><title>The Doppler Effect</title></head><body bgcolor="#000099">
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<h1 align="center"><font color="#ff0000" face="Georgia, Times New Roman, Times, serif"><img src="doppler_files/dpbanner.gif" height="60" width="400"></font></h1>
<p align="center"> 
  <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" align="absmiddle" border="2" height="400" width="600">
    <param name="movie" value="doppler.swf">
    <param name="quality" value="high">
    <param name="bgcolor" value="#000099">
    <embed src="doppler_files/doppler.swf" quality="high" bgcolor="#000099" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" align="absmiddle" height="400" width="600"> 
  </object>
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<p align="justify"><font color="#99ffff">This flash animation shows a moving source 
  emitting circular waves. </font></p>
<p align="justify"><font color="#99ffff">The slider on the left controls the ratio 
  of speed of source to the speed of wave, referred to as the Mach number. </font></p>
<p align="justify"><font color="#99ffff">We get a shock wave when the speed of 
  a source exceeds the wave speed, i.e. when Mach number&gt;1. </font></p>
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